You can access the Dynamo Administration UI at http://hostname:port/dyn/admin. (On Windows, you can also select the ATG Dynamo Server Admin icon in the Tools folder of the ATG 2007.3 program group.) The initial user name and password are:

User Name: adminPassword: admin

For information about including the Dynamo Administration UI when you assemble an EAR file, see the Including the Dynamo Administration UI section of the Developing and Assembling Nucleus-Based Applications chapter of the ATG Programming Guide.